class Reverse:
    def __init__(self, data):
        self.data = data
        self.index = len(data)

    def __iter__(self):
        return self

    def next(self):
        if self.index == 0:
            raise StopIteration
        self.index = self.index - 1
        return self.data[self.index]

for c in Reverse('abcde'):
    print str(c) 

print '=-============='

i = iter(Reverse('abce'))
for c in i:
    print c
    print i.next()
